Annotation of www/ctm.html, Revision 1.1
1.1 ! graichen 1: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
! 2: <HTML>
! 3: <HEAD>
! 4: <TITLE>CTM</TITLE>
! 5: </HEAD>
! 6: <BODY>
! 7:
! 8: <H1>CTM for OpenBSD </H1>
! 9:
! 10: <P><FONT SIZE=+1>... get the current OpenBSD source- or cvs-tree daily
! 11: via email </FONT></P>
! 12:
! 13: <P>
! 14: <HR WIDTH="100%"></P>
! 15:
! 16: <H3>WHAT IS CTM ?</H3>
! 17:
! 18: <P>ctm is a system which was designed by poul-henning kamp for making all
! 19: the changes to the FreeBSD source- and cvs-tree (and some other trees -
! 20: like the FreeBSD ports-tree) available on a daily (or multiple time per
! 21: day) basis by email. this is a very good way to stay up to date with the
! 22: current source- or cvs-tree if you have a bad internet connection - for
! 23: instance via modem. </P>
! 24:
! 25: <P>ctm uses only very low bandwith for distributing the changes to the
! 26: tree - and it compresses these differences using gzip -9.</P>
! 27:
! 28: <H3>HOW DOES IT WORK ?</H3>
! 29:
! 30: <P>the basic idea of ctm is - that you subscribe to a special mailinglist
! 31: to get the daily changes of the OpenBSD source- or cvs-tree and then you'll
! 32: get a mail each day containing all the changes to the tree (maybe we increase
! 33: the number of ctm files sent per day in the future) - one such set of differences
! 34: is called a "delta".</P>
! 35:
! 36: <P>if you received your first delta - you have to download all the delta's
! 37: until the first delta you received by email - this always starts with a
! 38: big - so called "base delta" - which contains the full source
! 39: tree you start with. starting from this big one all other deltas only contain
! 40: the changes to the tree of the day of the delta generation. to avoid that
! 41: you have to get the base delta and then some hundred relative deltas a
! 42: new base delta is generated as a startpoint each 100 relative delta's -
! 43: so that you always have to get less than hundred relative deltas for starting
! 44: ctm :-)</P>
! 45:
! 46: <H3>HOW MUCH BANDWIDTH DOES CTM USE ?</H3>
! 47:
! 48: <P>as said above the base delta contains the full source- or cvs-tree so
! 49: it is really big - you'll have to get it via ftp from the site below. here
! 50: are the sizes of the current base deltas: ~ 45 mbyte for OpenBSD-src.0001.gz
! 51: - the base delta for the source-tree ~ 55 mbyte for OpenBSD-cvs.0001.gz
! 52: - the base delta for the cvs-tree and the size of the relative deltas vary
! 53: from ~ 10 kbyte to ~ 100 kbyte usually and sometimes they are some (1,2
! 54: or 3) mbytes - but they are always split into 100 kbyte mails which will
! 55: automatically assembled from the ctm-programs - the bigger sizes come from
! 56: bigger changes in the source- or cvs-tree (update of the binutils, import
! 57: of perl etc.)</P>
! 58:
! 59: <H3>HOW DO I USE CTM ?</H3>
! 60:
! 61: <P>ctm is very simple to use: </P>
! 62:
! 63: <LI>subscribe to the ctm mailinglist you want</LI>
! 64:
! 65: <UL>
! 66: <P><TT>echo subscribe OpenBSD-src | mail majordomo@OpenBSD.org for the
! 67: source-tree</TT></P>
! 68: </UL>
! 69:
! 70: <P>or</P>
! 71:
! 72: <UL>
! 73: <P><TT>echo subscribe OpenBSD-cvs | mail majordomo@OpenBSD.org for the
! 74: cvs-tree</TT></P>
! 75: </UL>
! 76:
! 77: <P>you should also subscribe to</P>
! 78:
! 79: <UL>
! 80: <P><TT>echo subscribe ctm-announce | mail majordomo@OpenBSD.org</TT></P>
! 81: </UL>
! 82:
! 83: <P>on this list i'll post announcements for users of ctm and there is also
! 84: a list for somekind of a log of the ctm delta generation - so you can see
! 85: what is all in the ctm delta and if the assembling of it succeeded - you
! 86: should really subscribe to this list if you use ctm using</P>
! 87:
! 88: <UL>
! 89: <P><TT>echo subscribe ctm-log | mail majordomo@OpenBSD.org</TT></P>
! 90: </UL>
! 91:
! 92: <LI>wait until you get your first delta</LI>
! 93:
! 94: <LI>unpack and assemble the ctm delta using ctm_rmail (for the sources
! 95: to all the ctm-programs see below)</LI>
! 96:
! 97: <UL>
! 98: <P><TT>ctm_rmail -p. -d. -b. the_mail_folder_containing_the_ctm_delta_mail</TT></P>
! 99: </UL>
! 100:
! 101: <P>after that you should have the bare ctm delta there (something like
! 102: OpenBSD-cvs.0015.gz or so)</P>
! 103:
! 104: <LI>if you have this - get all the deltas beginning with 0001 up to your
! 105: first mail-received one via ftp from ftp.cs.tu-berlin.de:/pub/bsd/CTM/OpenBSD
! 106: also known as ftp6.de.FreeBSD.org:/pub/bsd/CTM/OpenBSD for the tree you
! 107: subscribed too - i'm very interested in sites all over the world who wan't
! 108: to mirror this or want to put up the ctm deltas there too</LI>
! 109:
! 110: <LI>then run ctm (you can get the sources of ctm which should compile at
! 111: least on OpenBSD just fine from the same ftp adress - maybe you have to
! 112: tweak it a bit for other systems - you may need the libmd from the FreeBSD
! 113: sources there eventually)</LI>
! 114:
! 115: <UL>
! 116: <P><TT>cd where_you_want_your_source_tree_to_be</TT></P>
! 117:
! 118: <P><TT>ctm -v -v /where_your_ctm_deltas_are_stored/OpenBSD-src.*</TT></P>
! 119: </UL>
! 120:
! 121: <P>or</P>
! 122:
! 123: <UL>
! 124: <P><TT>cd where_you_want_your_cvs_tree_to_be</TT></P>
! 125:
! 126: <P><TT>ctm -v -v /where_your_ctm_deltas_are_stored/OpenBSD-cvs.*</TT></P>
! 127: </UL>
! 128:
! 129: <LI>this will take some time for the base delta - and less time for the
! 130: relative ones * now you can run ctm_rmail and ctm on every new ctm delta
! 131: to get up to date</LI>
! 132:
! 133: <H3>WHAT SHOULD I CHOOSE - SOURCE- OR CVS-TREE VIA CTM ?</H3>
! 134:
! 135: <P>this simply depends on your diskspace - the better is the cvs-tree -
! 136: because you can make modifications to the local checked out copy (ctm can't
! 137: yet handle modifications in files it want to update) - but the drawback
! 138: is a _lot_ of diskspace - you need currently ~ 240 mbyte for the full cvs-tree
! 139: and ~ 200 mbyte for the checked out source tree plus ~ 100 mbyte for the
! 140: obj files while "make build" if you have enough space then go
! 141: for the cvs-tree - then you simply have to check out a local copy of the
! 142: source tree after the first ctm -v -v command using cd /usr cvs -q checkout
! 143: -PA src and after each new applied ctm relative delta you have to run cd
! 144: /usr cvs -q update -PAd src to get your local copy up to date if you don't
! 145: have enough space so you can use ctm for getting the checked out copy of
! 146: the source tree - but then you have to think about the handling of local
! 147: modifications - at this point someone from the NetBSD people is using a
! 148: mixture of null and union mounts and some scripts for doing this - if i
! 149: remember right it was something like this /usr/src-local is null mounted
! 150: to /usr/src - /usr/src-ctm is union mounted to /usr/src so you have all
! 151: local modifications in /usr/src-local and you have to run a script which
! 152: does something like for all files in /usr/src-local diff them against the
! 153: /usr/src-ctm versions and apply this patch to a fresh ctm applied /usr/src-ctm
! 154: tree mounted in the above way against a fresh /usr/src-local directory
! 155: the union mount of /usr/src-ctm guaranties that the /usr/src-ctm tree is
! 156: not modified which is very importand for the operation of ctm all this
! 157: is just a rough idea - all in all - it is doable because someone from the
! 158: NetBSD people is definitely doing it in a way close to this one</P>
! 159:
! 160: <H3>HOW STABLE IS CTM FOR OpenBSD ?</H3>
! 161:
! 162: <P>i will call this now more than a "public beta" state - i'm
! 163: using ctm now for more than two months to stay up to date with the OpenBSD
! 164: cvs-tree without any problems - and also the FreeBSD people use ctm very
! 165: extensively for years know without any major problems i think (i also use
! 166: ctm for FreeBSD now for about half a year without any problems) so i think
! 167: you really can trust ctm - in the last weeks also some other people used
! 168: it and i haven't heard aboutany problems so far</P>
! 169:
! 170: <H3>WHERE CAN I FIND MORE INFORMATION ABOUT CTM FOR OpenBSD ?</H3>
! 171:
! 172: <P>here :-) - but you can take all the information from FreeBSD and you
! 173: have the man-pages for the ctm-programs in the ctm source-package there
! 174: are some informations about the use and ideas of ctm in the FreeBSD handbook
! 175: - which you will find under http://www.FreeBSD.org/handbook/ctm.html</P>
! 176:
! 177: <P>if you have problems with ctm you may also ask me - i'll try to help
! 178: you as far as i can and as far as i have enough time (which is a big problem
! 179: in the moment)</P>
! 180:
! 181: <H3>OK - IF YOU GOT HERE ...</H3>
! 182:
! 183: <P>... and decided to use ctm from now on - here's the summary of adresses:
! 184: mailinglists: </P>
! 185:
! 186: <LI><TT>echo subscribe OpenBSD-src | majordomo@OpenBSD.org</TT></LI>
! 187:
! 188: <LI><TT>echo subscribe OpenBSD-cvs | majordomo@OpenBSD.org</TT></LI>
! 189:
! 190: <LI><TT>echo subscribe ctm-announce | majordomo@OpenBSD.org</TT></LI>
! 191:
! 192: <LI><TT>echo subscribe ctm-log | majordomo@OpenBSD.org</TT></LI>
! 193:
! 194: <P>ftp server:</P>
! 195:
! 196: <LI>ftp.cs.tu-berlin.de:/pub/bsd/CTM/OpenBSD</LI>
! 197:
! 198: <LI>ftp6.de.FreeBSD.org:/pub/bsd/CTM/OpenBSD</LI>
! 199:
! 200: <P>there you'll find the deltas and the sources to ctm (ctm.tar.gz - simply
! 201: put it into /usr/src/usr.sbin and it should compile fine under OpenBSD)</P>
! 202:
! 203: <P>i'll also make any importnat notes and announcements about ctm in</P>
! 204:
! 205: <LI>ctm-announce@OpenBSD.org</LI>
! 206:
! 207: <LI>misc@OpenBSD.org</LI>
! 208:
! 209: <P>and the big ones in</P>
! 210:
! 211: <LI>announce@OpenBSD.org</LI>
! 212:
! 213: <P>and pleeese - send me a mail if you use ctm for OpenBSD so that i can
! 214: see how many people are using it !</P>
! 215:
! 216: <H3>THANKS ...</H3>
! 217:
! 218: <P>... go to: </P>
! 219:
! 220: <LI>poul-henning kamp (phk@FreeBSD.org) for making ctm possible and helping
! 221: me getting the delta generation running</LI>
! 222:
! 223: <LI>theo de raadt (deraadt@theos.com) for making OpenBSD possible :-) and
! 224: giving me all the ressources i needed for creating the ctm deltas on cvs.OpenBSD.org</LI>
! 225:
! 226: <LI>wolfram schneider (wosch@FreeBSD.org) for setting up the ftp space
! 227: for the deltas on ftp.cs.tu-berlin.de</LI>
! 228:
! 229: <LI>... and all the others who contributed indirectly</LI>
! 230:
! 231: <P>SO - GOOD LUCK WITH CTM FOR OpenBSD wishes</P>
! 232:
! 233: <P>t</P>
! 234:
! 235: <HR></LI>
! 236:
! 237: <ADDRESS><A HREF="mailto:graichen@OpenBSD.org">Thomas Graichen</A></ADDRESS>
! 238:
! 239: <P><!-- Created: Mon Oct 28 22:20:54 MET 1996 --><!-- hhmts start -->Last
! 240: modified: Mon Oct 28 22:24:34 MET <!-- hhmts end --></P>
! 241:
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! 243: </HTML>
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